Math  /  Algebra

QuestionGraph this function: f(x)=47x3f(x)=\frac{4}{7} x-3
Click to select points on the graph. Submit

Studdy Solution

STEP 1

1. The function f(x)=47x3 f(x) = \frac{4}{7}x - 3 is a linear function.
2. We need to graph this function by identifying key points.

STEP 2

1. Identify the slope and y-intercept of the function.
2. Determine the y-intercept point.
3. Use the slope to find another point on the graph.
4. Plot the points and draw the line.

STEP 3

Identify the slope and y-intercept from the function f(x)=47x3 f(x) = \frac{4}{7}x - 3 .
The slope m m is 47 \frac{4}{7} .
The y-intercept b b is 3-3.

STEP 4

Determine the y-intercept point.
The y-intercept occurs when x=0 x = 0 .
Substitute x=0 x = 0 into the function:
f(0)=47(0)3=3 f(0) = \frac{4}{7}(0) - 3 = -3
The y-intercept point is (0,3) (0, -3) .

STEP 5

Use the slope to find another point on the graph.
Starting from the y-intercept (0,3) (0, -3) , apply the slope 47 \frac{4}{7} .
This means for every increase of 7 units in x x , y y increases by 4 units.
From (0,3) (0, -3) , move 7 units to the right (increase x x by 7) and 4 units up (increase y y by 4).
The new point is (7,1) (7, 1) .

STEP 6

Plot the points (0,3) (0, -3) and (7,1) (7, 1) on the graph.
Draw a straight line through these points to represent the function.
The graph of the function f(x)=47x3 f(x) = \frac{4}{7}x - 3 is now plotted with the points (0,3) (0, -3) and (7,1) (7, 1) .

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